I am going in the opposite direction. Learnt on a high aspect Taaroa foil which really just required getting used to the speed. That speed however, gave the foil a fairly high level of yaw and roll stability. I am moving to trying out a more medium aspect Alpine V3 with a Wave wing. Just arrived and I expect a slower and more maneuverable ride along with some slow speed stability. To answer your question, It took me a fair while to get up on the foil initially. Numerous attempts that failed until I could let go of my surfboard kiting backfoot mindset and adopt a vision of myself as an extension of the mast more like dropping in on a wave. Then it was just time riding and staying calm and focused on the horizon...

The more foils you ride, the shorter amount of time it takes to learn/transition between foils. I prefer high aspect ratio foils for their speed and upwind performance. A session or two to get dialed into a new foil but riding a new foil on the first tack.

Some foils are un-ridable/incorrectly set up... The worst foil for me was a V1 TKF Manta that clearly needed shims to change the angle of attack of the front wing as it was too high. For new foilers, I'm happy to test ride their foil to provide feedback on how it rides. There have been 1-2 Spotz that needed tweaks to their rear wing config.